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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
# description: test for the preemptirqsoff tracer
MOD=preemptirq_delay_test
fail() {
reset_tracer
rmmod $MOD || true
exit_fail
}
unsup() { #msg
reset_tracer
rmmod $MOD || true
echo $1
exit_unsupported
}
unres() { #msg
reset_tracer
rmmod $MOD || true
echo $1
exit_unresolved
}
modprobe $MOD || unres "$MOD module not available"
rmmod $MOD
grep -q "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
grep -q "irqsoff" available_tracers || unsup "irqsoff tracer not enabled"
reset_tracer
# Simulate preemptoff section for half a second couple of times
echo preemptoff > current_tracer
sleep 1
modprobe $MOD test_mode=preempt delay=500000 || fail
rmmod $MOD || fail
modprobe $MOD test_mode=preempt delay=500000 || fail
rmmod $MOD || fail
modprobe $MOD test_mode=preempt delay=500000 || fail
rmmod $MOD || fail
cat trace
# Confirm which tracer
grep -q "tracer: preemptoff" trace || fail
# Check the end of the section
egrep -q "5.....us : <stack trace>" trace || fail
# Check for 500ms of latency
egrep -q "latency: 5..... us" trace || fail
reset_tracer
# Simulate irqsoff section for half a second couple of times
echo irqsoff > current_tracer
sleep 1
modprobe $MOD test_mode=irq delay=500000 || fail
rmmod $MOD || fail
modprobe $MOD test_mode=irq delay=500000 || fail
rmmod $MOD || fail
modprobe $MOD test_mode=irq delay=500000 || fail
rmmod $MOD || fail
cat trace
# Confirm which tracer
grep -q "tracer: irqsoff" trace || fail
# Check the end of the section
egrep -q "5.....us : <stack trace>" trace || fail
# Check for 500ms of latency
egrep -q "latency: 5..... us" trace || fail
reset_tracer
exit 0
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